Not so long ago I finaly went ahead and ordered my first Axiom speaker package; On-wall M3, VP100 and QS4 as surround. I must say I am really impressed by how clear and powerfull this little system sounds in my relatively small room (14' X 13' X 8').

I decided to wait for the subwoofer, since I was not sure if I should go with the EP175 or something bigger.

Keep in my mind, this is a very well insulated little room (Roxul in every wall) and that I listen mostly to movies. (90% movies, 10% music (jazz, rock, alternalive))

I am looking to spend aroung 600-900$Finaly, if it is of any use, my receiver is a Onkyo TX-NR616.

For your system, and room size, the EP350 gets my vote. I use mostly M22's and our rooms are about the same area wise. I use the EP350 and have been quite happy with it. From there, I would move to the EP500 as the next move up.

Quake, welcome. Depending on your budget, either the EP350 or EP500 should be considered. I use the EP500, and the lower extension is significant on some of the movie material you watch. The factor of the mains being on-wall doesn't really create an even greater advantage, since any relative weakness of that design would be in the mid-bass around 70-80Hz, and any good sub covers that well.